Research Technician – Chemical Safety Assessment & Genetic Toxicology (ToxTracker®)

Are you an experienced laboratory technician with a passion for cell-based assays and high-quality science? Would you like your work to contribute directly to the development of safer medicines, chemicals and consumer products?

Toxys is a leading biotechnology company specializing in innovative in vitro technologies for chemical safety assessment. Our proprietary ToxTracker® platform enables early identification of genotoxic hazards while providing mechanistic insight into cellular stress responses. Our technologies are trusted by leading pharmaceutical and chemical companies worldwide and are supported by a strong scientific foundation, including peer-reviewed publications and collaborations with industry and regulatory stakeholders.

As a member of our Genetic Toxicology team, you will perform ToxTracker® and related in vitro assays for international clients in a commercial service laboratory. You will work closely with scientists and fellow technicians to deliver high-quality, reproducible data within agreed project timelines.

·       Perform mammalian cell culture and maintain reporter cell lines.

·       Execute ToxTracker® studies according to SOPs and quality standards.

·       Perform flow cytometry, fluorescence microscopy and related laboratory techniques.

·       Document, analyse and report experimental data accurately.

·       Prepare reagents and maintain laboratory equipment.

·       Support continuous improvement of laboratory workflows and quality systems.

What we're looking for

·       BSc or MSc in Life Sciences, Biomedical Sciences, Biotechnology or a related discipline.

·       At least two years of laboratory experience in a commercial service laboratory, CRO, biotechnology, pharmaceutical or diagnostic environment is preferred.

·       Hands-on experience with mammalian cell culture.

·       Experience with flow cytometry; microscopy or high-content imaging is an advantage.

·       Quality-focused, well organised and accurate.

·       Excellent English communication skills.

·       A proactive team player with a customer-focused mindset.

Why join Toxys?

·       Meaningful work that contributes to safer medicines, chemicals and consumer products.

·       An innovative, international and collaborative team.

·       State-of-the-art laboratories at Leiden Bio Science Park.

·       Professional development and learning opportunities.

·       Competitive salary and attractive employment conditions.

·       An opportunity to contribute to the transition towards animal-free safety assessment.

For questions about the position, please contact:
Inger Brandsma
i.brandsma@toxys.com

Interested?

Please send your CV and motivation letter to jobs@toxys.com.

Closing date :  August 18,2026